programming-challenges/challenges/convert-number-from-base-to-another/solutions/c/function/character.c

#include "character.h"

#include <stdlib.h>
#include <string.h>

void character_append(char* string, char character) {
  size_t length = strlen(string);
  string[length] = character;
  string[length + 1] = '\0';
}